Oscilloscope expansion board based on AFE03

Project Principle:
This project utilizes analog circuit components such as resistor dividers, operational amplifiers, and comparators to implement signal conditioning, amplification, shifting, filtering, and comparison functions to adapt to the input and output ranges of the STM32H750's ADC and DAC, thus realizing the oscilloscope's sampling and output functions. It also uses switches and voltage divider networks to implement the segmentation function of analog input and output channels, improving the measurement accuracy and output resolution of small signals. Furthermore, it utilizes the STM32H750's timer function to implement triggering and frequency measurement functions.
Project Functionality:
This project can function as a dual-channel oscilloscope, measuring analog signals within a ±15V range and converting them into digital signals within a 0-3.3V range for sampling by the STM32H750's ADC. It can also function as a single-channel signal source, outputting analog signals within a ±10V range, which are then generated by the STM32H750's DAC. It can also square-wave the input signal and utilize comparators and timers to implement triggering and frequency measurement functions.
3D Simulation Diagram: